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Calculator Community => TI Calculators => General Calculator Help => Topic started by: robberguy189 on October 27, 2012, 04:37:19 pm

Title: My calculator cannot receive a new OS
Post by: robberguy189 on October 27, 2012, 04:37:19 pm

I tried sending os 2.43 to my calc, but it failed.  Now my calculator has no os.  Whenver I try downloading os it gets to validation and then error: turn on to turn unit off, then turn back on.  What do I do?  I've tried multiple computers.

Title: Re: My calculator cannot receive a new OS
Post by: Jim Bauwens on October 27, 2012, 04:43:36 pm

Quoting BrandonW from IRC:

Quote

22:41 <+BrandonW> Somebody tell that guy to install 2.55MP.                      
22:41 <+BrandonW> He may be on boot code 1.03.                                                                      
22:41 <+BrandonW> And then when he's done with that, patch it and install OS 2.43.

Title: Re: My calculator cannot receive a new OS
Post by: robberguy189 on October 27, 2012, 05:03:51 pm

Installed 2.55 MP alright.  It turns out the os I had been trying to install was not 2.55 MP at all!  The default os in the ti connect directory is 2.22.  I quit trying to install 2.43 after a few attempts and tried instsalling the one in the ti connect directory (2.22 as I mentioned before.) 

So then I downloaded 2.55 off the website, installed fine.

Thank you all very much.

Title: Re: My calculator cannot receive a new OS
Post by: Deep Toaster on October 27, 2012, 08:04:05 pm

If you still want to install OS 2.43 (basically, if you're planning to do anything with it besides math), you can use EpicFail (http://ourl.ca/16275) to remove the downgrade protection.

EDIT: Moved to General Calculator Help.